Portable pneumatic tool



FIG. 1 is a front elevational view of a portable pneumatic tool, showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevation view thereof; and

FIG. 6 is a right side elevation view thereof. 

The ornamental design for a portable pneumatic tool, substantially as shown and described. 